Which pair of elements can form an alloy

Options

A. `Zn + Pb`
B. `Fe + Hg`
C. `C + Pt`
D. `Fe+Cr`

Answer

To determine which pair of elements can form an alloy, we need to analyze each option based on the properties of metals and their ability to combine without significant reactivity issues. An alloy is typically a mixture of two or more metals, or a metal with a non-metal, that results in a material with enhanced properties.

### Step-by-Step Solution:

1. **Understanding Alloys**:
- An alloy is a mixture of two or more elements, where at least one is a metal. Alloys are created to enhance certain properties such as strength, ductility, and resistance to corrosion.

2. **Analyzing the Options**:
- **Option 1: Zinc and Lead**:
- Zinc and lead do not form a stable alloy due to surface reactivity. When mixed, they can react rather than form a solid solution.
- **Option 2: Iron and Mercury**:
- Iron and mercury also do not form a stable alloy. Mercury is a liquid metal at room temperature and can dissolve iron, but this does not result in a solid alloy.
- **Option 3: Carbon and Platinum**:
- Carbon is a non-metal and does not form an alloy with platinum, which is a metal. Alloys typically consist of metals.
- **Option 4: Iron and Chromium**:
- Iron and chromium can form a solid solution and create an alloy known as stainless steel, which is widely used for its strength and corrosion resistance.

3. **Conclusion**:
- The only pair that can form an alloy is **Iron and Chromium**.

### Final Answer:
The pair of elements that can form an alloy is **Iron and Chromium**.